import java.util.StringTokenizer;


class P846_39643 {

	public static void main(String[] args) {
		int cases = Integer.parseInt(readLn());
		
		for (int k = 0; k < cases; k++) {
			process();
		}
		
	}
	 
	
	private static void process() {
		
		StringTokenizer st = new StringTokenizer(readLn());
		
		long x = Long.parseLong(st.nextToken());
		long y = Long.parseLong(st.nextToken());
		
		if (x == y) System.out.println("0");
		else {
			
			long d = y - x;
			long k = (long)Math.sqrt(d);
			System.out.println((long)(k + k - 1 + Math.ceil((d - (k * k)) / (double)k)));
		}
		
	}

	static String readLn() {
		String newLine = System.getProperty("line.separator");
		StringBuffer buffer = new StringBuffer();
		int car = -1;
		try {
			car = System.in.read();
			while ((car > 0) && (car != newLine.charAt(0))) {
				buffer.append((char) car);
				car = System.in.read();
			}
			if (car == newLine.charAt(0))
				System.in.skip(newLine.length() - 1);
		} catch (java.io.IOException e) {
			return (null);
		}
		if ((car < 0) && (buffer.length() == 0))
			return (null);
		return (buffer.toString());
	}
	
}
